<template>
<el-container class="home-container">
<!--头部布局-->
  <el-header>
<img src="../assets/1.png" alt="">
<span>电商后台管理</span>
<el-button type="info" @click="logout">退出</el-button></el-header>
  <el-container>
<!--侧边栏-->
    <el-aside :width="isCollapse ? '64px' : '200px'">
<!--可折叠菜单区域-->
<div class="toogle-button" @click="toogleCollapse">|||</div>
<!--侧边菜单栏区域-->
<el-menu background-color="#333744" text-color="#fff" active-text-color="#409EFF" unique-opened :collapse="isCollapse" :collapse-transition="false" router :default-active="activePath">
<!--一级菜单-->
<el-submenu :index="item.id + ''" v-for="item in menuList" :key="item.id">
<!--一级菜单内容模板区域-->
  <template slot="title">
<!--图标-->
    <i :class="iconObj[item.id]"></i>
    <span>{{ item.authName }}</span>
  </template>
<!--二级-->
    <el-menu-item :index="'/' + subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/' + subItem.path)"> <template slot="title">
<!--图标-->
    <i class="el-icon-menu"></i><span>{{ subItem.authName }}</span>
  </template></el-menu-item>
  </el-submenu>
</el-menu>
</el-aside>
<!--主题内容区域-->
    <el-main>
<!--路由占位-->
<router-view></router-view>
</el-main>
  </el-container>
</el-container>
</template>

<script>
export default {
  data () {
    return {
      menuList: [],
      // 一级菜单图标对象
      iconObj: {
        125: 'iconfont icon-user',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao'
      },
      isCollapse: false,
      // 被激活的路由导航
      activePath: ''
    }
  },
  // 钩子函数
  created () {
    this.getMenuList()
    // 页面一加载时就获取
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout () {
      window.sessionStorage.clear()
      // 跳转到登录页
      this.$router.push('/login')
    },
    async getMenuList () {
      const { data: res } = await this.$http.get('menus')
      console.log(res)
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      }
      this.menuList = res.data
    },
    // 控制左侧菜单栏折叠
    toogleCollapse () {
      this.isCollapse = !this.isCollapse
    },
    saveNavState (activePath) {
      window.sessionStorage.setItem('sctivePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style lang="less" scoped>
.home-container{
height: 100%;
}
.el-header{
background-color: #373D41;
display: flex;
justify-content: space-between;
padding-left: 0;
align-items: center;
color: #FFFFFF;
font-size: 20px;
>div{
display: flex;
align-items: center;
}
span{
padding-left: 15px;
}
}
.el-aside{
background-color: #333744;
.el-menu{
border-right: none;
}
}
.el-main{
background-color: #EAEDF1;
}
.iconfont{
margin-right: 15px;
}
.toogle-button{
background-color: #4A5064;
color: #ffffff;
font-size: 10px;
line-height: 24px;
text-align: center;
cursor: pointer;
letter-spacing: 0.2em;
}
</style>
